A structure and fabrication technology for a reflective, ambient light, low cost display is described incorporating a plurality of cells laid out side by side and stacked as many as three levels on top of each other. Each stack of three cells being driven by an array of TFT's positioned on the bottom...http://www.google.com.au/patents/US6844957?utm_source=gb-gplus-sharePatent US6844957 - Three level stacked reflective display
